/usr/src/sys/i386/conf/NOTES # # Change the size of the kernel virtual address space. Due to # constraints in loader(8) on i386, this must be a multiple of 4. # 256 = 1 GB of kernel address space. Increasing this also causes # a reduction of the address space in user processes. 512 splits # the 4GB cpu address space in half (2GB user, 2GB kernel). # options KVA_PAGES=260 0803root▲ ★NGNG>>802 /* * Size of Kernel address space. This is the number of page table pages * (4MB each) to use for the kernel. 256 pages == 1 Gigabyte. * This **MUST** be a multiple of 4 (eg: 252, 256, 260, etc). */ #ifndef KVA_PAGES #ifdef PAE #define KVA_PAGES 512 #else #define KVA_PAGES 256 #endif #endif